Sidney parker



(No Model.)

S PARKER BLAST FURNACE.

Patented Feb. 10, 1891.

UUNITED STATES PATENT OFFICE.

SIDNEY PAR-KER, OF CHICAGO, ILLINOIS, ASSIGNCR OF TVO-THIRDS TO IV. 0. OSGOOD, OF SAME PLACE.

BLAST-FU RNAC E.

SPECIFICATION forming part of Letters Patent No. 446,168, dated February 10, 1891.

Application filed August 29, 1889. Serial No. 322.342. (No model.)

To all whom it may concern.-

Be it known that I, SIDNEY PARKER, acitizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Blast-Furnaces, of which the following is a specification.

My invention relates to blast-furnaces; and it consists in an improved construction and arrangement of apparatus, which will be fully described hereinafter, reference being had to.

the accompanying drawings, in which- Figure 1 is a sectional elevation of a blastfurnace embodying my improvements. 2 is a plan view.- Fig. 3 is a horizontal Section of one of the tuyeres.

The general arrangement of the furnace A, boilers B, and superhcater G will depend upon the lay of the ground or other circumstances; but where it is practicable the boilers should be placed at an elevation to permit a fine D to be extended from the top of the furnace to the bridge-wall of the boiler-furnace, so that the waste heat from the furnace is made the means of heating the boilers.

From the steam-domes H of the boilers one or more pipes F extend to one or more superheaters O, which are heated by separate fires, so as to rapidly and highly heat the steam which passes to coils J of such size as to secure an extended heating-surface, as shown in dotted lines in Fig. 2. The smoke-pipe E from the superheaters extends to the flue 'D. From the superheaters the steam-pipes P extend to the furnace and into the tuyeres thereof, so that the steam from the boilers, after being superheatechis directed from the tuyeres into the furnace in the same manner as the hot air in furnaces of ordinary construction. The pipeP is somewhat smaller than the tuyere, and air sufficient to support combustion is drawn in through the intervening space, the pipe and tuyere forming an inspirator. (See Fig. 3.) I have found that by heating the steam to a sufliciently high temperature the supply of air maybe greatly reduced or entirely out off.

By the use of highly-superheated steam I obtain a stronger and more available blast Fig. 7

stack I can utilizethe waste heat of the gases from the furnace not only for heating the boilers, but also for a preliminary heating or roasting of the ore. Thus there is an endless belt 2 passing over drums 3 3 and extending through the flue D, onto which belt the ore is dumped and over which the heated gases pass in contact with the ore, which is gradually fed into the furnace as the belt moves, driven by any suitable motor. This device may be used in all furnaces.

It is customary tosurround furnaces and heated structures of various kinds with Wafer-jackets to prevent any undue increase in temperature,which is destructive to the structure and otherwise objectionable. Such Water-jackets cost in large furnaces thousands of dollars and deteriorate rapidly. To avoid this expense and yet maintain the structure comparatively cool, I combine therewith a water-pipe q, arranged near the upper end with perforations so arranged as to direct streams of water against the sides of the furnace to trickle down the same. I have found that I can thus maintain the desired low temperature with as little water as is required for a water-jacket and at a fraction of the expense of erection and maintenance required to construct and use a water-jacket. A casings of thin metal surrounds the furnace to prevent the water splashing from the furnace and to direct the steam upward out of the way. i

\Vithout limiting myself to the precise construction and arrangement and application of-parts and features shown, I claim- The combination of a furnacewith an independent steam-generator, and a conduit connecting the top of the furnace with the flues of the stemngenemter,and steam-pipes I nmneto this specification in the p leading from the steam-generator to' a, supertwo subscribing witnesses. v heater and from the superheater to the tuyeres SIDNEY PARKER. ot the furnace, and a smoke-stack eommuni- 1 5 eating with the superheater and with the con- XVitnesses: d nit, substantially as set forth. P. A. I IOYNE,

resence of In testimony whereof I have signed my, MARK A. FOOTE. 

